English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We theoretically analyze the anisotropic magnetoresistance (AMR) effects ofbcc Fe (+), fcc Co (+), fcc Ni (+), Fe$_4$N (-), and a half-metallicferromagnet (-). The sign in each ( ) represents the sign of the AMR ratioobserved experimentally. We here use the two-current model for a systemconsisting of a spin-polarized conduction state and localized d states withspin--orbit interaction. From the model, we first derive a general expressionof the AMR ratio. The expression consists of a resistivity of the conductionstate of the $\sigma$ spin ($\sigma=\uparrow$ or $\downarrow$), $\rho_{s\sigma}$, and resistivities due to s--d scattering processes from theconduction state to the localized d states. On the basis of this expression, wenext find a relation between the sign of the AMR ratio and the s--d scatteringprocess. In addition, we obtain expressions of the AMR ratios appropriate tothe respective materials. Using the expressions, we evaluate their AMR ratios,where the expressions take into account the values of $\rho_{s\downarrow}/\rho_{s \uparrow}$ of the respective materials. The evaluated AMRratios correspond well to the experimental results.

Anisotropic Magnetoresistance Effects in Fe, Co, Ni, Fe_4N, and Half-Metallic Ferromagnet: A Systematic Analysis